60 MeV/u^(18)O离子同天然铀反应钡同位素截面的测定  

Determination of Cross Sections of Ba Isotopes in Interaction of 60 MeV/u ^(18)O with ^(238)U

作　　者：杨维凡[1] 徐岩冰[1] 袁双贵[1] 牛雁宁[1] 丁华杰[1] 

机构地区：[1]中国科学院近代物理研究所,甘肃兰州730000

出　　处：《原子核物理评论》2004年第4期398-399,共2页Nuclear Physics Review

基　　金：国家自然科学基金资助项目(10075063;10175079);国家重大基础研究发展规划资助项目(G2000077400)~~

摘　　要：通过60MeV/u18O离子照射天然铀靶产生Ba放射性同位素,使用BaCl2沉淀法从大量铀和其它反应产物混合物中分离出Ba.通过离线γ谱学方法测量了Ba样品的γ射线单谱,根据Ba同位素特征γ射线峰的强度及其它相关数据计算了Ba同位素的生成截面.发现在厚铀靶的情况下,缺中子Ba同位素仍有较高的截面.The radioactive Ba isotopes were produced by 60 MeV/u^(18)O ion bombardment of natural uranium. Ba was separated from U and the reaction product mixture by BaCl_(2) precipitation. The Ba fraction was measured by off-line γ-ray spectroscopy. The cross sections of the individual Ba isotope were calculation based on the intensities of the character γ-ray peaks of Ba isotopes and other relative information. It was found that the n-deficient Ba isotopes have higher cross sections using the thick uranium targets.

关 键 词：截面 离子 谱学 相关数据 中子 Γ谱 反应产物 天然铀 γ射线 照射 

分 类 号：O571[理学—粒子物理与原子核物理] R144[理学—物理]